Bred, Fed, and Led

The Empire has offered us a hefty sum: 15 Crowns, plus some options on the lands hereabouts once they've driven off you lot -- which shouldn't be much longer, if they get their hands on that list. Now us, we don't care much who wins. Either way, we get a lot of freedom to do as we please. Come up with a better offer and we can do business. But! We're a hard lot, but fair. Can't expect you to buy the list sight unseen, can we? So, I'll give you one of the names on the list, so you can confirm we've actually got the list, and it's the genuine article. Ruprecht Kemmler is your man. When you've confirmed that Kemmler's loyalties lie with you, see just how much your masters are willing to pay for the safe return of the list. We'll chat again later, I'm sure.

Enter the ruins of Hazelhof and find Ruprecht Kemmler, dead or alive. Interact with him (or what is left of him) to confirm that he is one of the local Chaos collaborators.